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Champion Brass · Air System
321-D
In stock · ships from Knoxville
This is a brass drain cock with 1/4" MNPT threads and an external seat, designed to drain moisture and contaminants from air tanks on heavy-duty trucks and trailers.
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Verified fitment for 7 applications
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All confirmed applications for this part number.
Other applications
Other applications
Fits any air tank with a 1/4" NPT female port; applications listed are examples from a verified source.
Part data verified against 2 catalog sources
Numbers this part supersedes or interchanges with. Showing 4 of 4.
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The metal-to-metal seat provides a leak-proof seal with hand tightening. It withstands temperatures from -65°F to +250°F and pressures up to 150 psi. Typical uses include belly dumps, end dumps, step decks, and various other trailer air systems.
Part Number: 321-D
DRAIN COCK
Unit: ea
Dealer: Knox Trailers
Compatibility, alternatives, and more
Parts commonly needed alongside air system
